Door-spring



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' DOOR SPRING.

No. 445,101. Patented Jan. 20,1891.

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A. D. TYLER, Jr.

DOOR SPRING No. 445,101. Patented Jan. 20, 1891.

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T NlTED stares PATENT OFFICE.

ABEL D. TYLER, JR, OF BROOKTON, MASSACHUSETTS, ASSIGNOR TO THE TYLER MANUFACTURING COMPANY, OF PORTLAND, MAINE.

DOOR-=SPRING.

SPECIFICATION forming part of Letters Patent No. 445,101, dated January 20, 1891.

Application filed February 26, 1890. Serial No. 341,898. (No model.)

This invention in window-blinds relates to that class of window-blind which consists of an outer and an inner fold hinged together,

' the inner fold being hinged to the windowcasing.

My invention has for its object to provide a novel connection, as will be described, between the window-frame and the outer fold of the blind, whereby the inner fold of the said blind may always be brought or carried into its true locking position when the blind is opened, the outer fold of the said blind being moved at the same time with the inner fold.

My invention therefore consists in the combination, with a window-frame and ablind hinged thereto, consisting of an outer and an inner fold, of an intermediate connection between the said frame and outer fold of the blind, composed, essentially, of arod and housing and means to permit of longitudinal movement of the rod, whereby the inner fold of the blind is always brought into its proper place when open, and pivotal connections attaching the rod to the outer fold and housing, substantially as will be described.

Other features of my invent-ion will be pointed out in the claims at the end of this specification.

Figure 1 is a front elevation of the outside of a window-frame and a twofold blind attached thereto, to enable my invention to be understood, the said blind being shown closed. Fig. 2 is a top or plan view of the window frame and blind shown in Fig. 1, the said blind being represented by dotted lines in its open position; and Fig. 3, a detail on an enlarged scale to more clearly showthe form of conneetion preferred by me.

The window-frame A, of any usual or wellknown construction, having secured to it by hinges A a twofold blind, consisting of an inner fold a and an outer fold a, secured to gether, as by hinges a, (see Fig. 2,) may be of any usual or well-known construction.

The inner fold a, as herein shown, has se cured to it, as by screws a a slotted, curved, or camshaped arm a which is engaged by the end of a crank or arm a on a shaft a extended through the window frame, as herein shown, from the enter to the inner side thereof, and engaged at its inner end, preferably, by the forked ends of a handle, not herein shown,) by turning which the arm or crank d is made to travel in contact with the guidearm a and move the inner fold of the blind to open or close the same, according to the direction in which the handle is turned.

In order that the inner fold a, of the twofold blind may be always brought back into its-true locking position when the blind is opened, as shown by dotted lines, Fig. 2, I have provided a novel connection between the window-frame A and the outer fold of the blind.

The novel connection referred to, as herein shown, preferably consists of a rod or bar I), having one end secured to the outer fold of the blind, as by an eye or pin 1), and its inner end detachably secured, as by a set-screw W, to a crank or arm b pivoted on a pin or red b seeu red to or forming part of a reciprocating bar or rod b located within a housing 1), which is secured, as herein shown, by screws to the window-frame. The rod If, as shown in Fig. 3, has hearings in annular rings or webs Z2 Z) on the inner side of the housing, and the said rod on opposite sides of the pin 1) is encircled by springsc 0, having one end bearing against the said pin and their other ends against the rings 6 b", the said springs being coiled in opposite directions, so that the slide-bar Zf may be centered when the said springs are relieved from tension.

In practice the operator turns the handle connected to the shaft a so as to move the crank-arm a in the cam-shaped arm a to open the inner fold of the blind, and as the said inner fold is opened the outer fold is moved with the inner fold and the said folds brought together, substantially as shown by dotted lines, Fig. 2. In practice it might frequently happen than an obstruction may become lodged between the outerandinner folds of the blind, and if the connection between J being compressed.

I have herein shown the blind as operated by mechanism from the inside of the frame; but I do not desire to limit myself in this respect, as the said blindmay be operated by hand, or other forms of operating mechanism may be used with my improved connection between the frame and the outer fold of the.

blind.

I have herein shown one form of novel connection; but I do not desire to limit myself to the particular form shown. So, also, I have herein shown the housing as secured to the window-frame and the rod as fastened to the outer fold of the blind; but I do not desire to limit myself to the particular construction shown, as the position of parts may be reversed and thehousing secured to theouter fold of the blind and the rod to the window-frame; but I prefer the manner of connection shown in the drawings.

It will be understood that the red I) is detachably secured to the crank-arm b by a setsorew b, so that a rod of one length may be replaced by a rod of another length if it should be desired to employ the housing with a blind of a difierent width.

I claim- 1. The combination, with a window-frame and a blind hinged thereto consisting of an outer and an inner fold, of an intermediate connection between the said frame and outer fold of the blind, composed, essentially, of a rod and housing and means to norm ally center and also to permit of longitudinal movement of the rod, whereby the inner fold of the blind is always brought into its proper place when open, and pivotal connections attaching the rod to the outer fold and housing, substantially as described. I

2. The combination, with a window-frame and a blind hinged thereto, and consisting of an outer and an inner fold, of a rod and housing and a spring in said housing encircling said rod to normally center and also permit of longitudinal movement of the rod, said' housing and rod being secured to the windowframe and pivotally connected to the outer fold of the blind by an intermediate rod 1),

substantially as and for the purpose specified.

3. The'combination, with a window-frame and a blind hinged thereto, consisting of an outer and an inner told, of a housing, a rod sliding therein, and an intermediate rod detachably connected to said housing and pivoted to the housing and blind, respectively, and a spring to permit of longitudinal movement of the sliding rod and also to normally center it, substantially as described.

4:. The combination, with a window-frame and blind hinged thereto, consisting of an outer and an inner fold, of a housing rigidly secured to the window-frame, areciprocating rod b adapted to slide in said housing, springs inclosing said rod on each side of the crank-arm to normally center it, a crank-arm secured to said rod, and a rod, as b, pivotally secured to the said cranl-;arm and pivotally connected to the outer fold of the blind, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ABEL D. TYLER, JR.

lVitnesses:

JAs. H. CHURCHILL, B. DEVVAR. 

